The Bedside Index of Severity in Acute Pancreatitis BISAP is a more-recent score than the older Ranson's Criteria. It predicts mortality risk in pancreatitis with fewer variables than Ranson's.
It does not require data points from 48 hours into a patient's hospital admission.
It includes
BUN > 25 mg/dL (8.9 mmol/L) :
NoYes
Abnormal mental status with a Glasgow coma score < 15 :